Build, fill glass with crushed ice
1 1/2 oz gin (4.5 cl, 3/8 gills)
1 1/2 oz fresh lime juice (4.5 cl, 3/8 gills)
1 tsp sugar (4 dashes)
Stir until frosted
Fill with soda
Float 1/2 oz green creme de menthe (1.5 cl, 1/8 gills)
Serve in a tall glass (10.0 oz)
